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Why a Seat Ibiza Replacement Key Won't Work The Ibiza is now equipped with the latest generation of driver assistance. Travel Assist ensures that your vehicle is in sync with the traffic, while Lane Assist eliminates the stress of changing lanes. Take off the battery compartment cover on the key fob (A). With a flat-head screwdriver, or a thumb nail, push the cover upwards and replace the CR2025. Dead Coin Battery If your key fob isn't working and you're successful in reprogramming it using an updated code, then the most likely culprit is a dead battery in the coin. You can replace the battery yourself in less than 10 minutes. Flip the key open first by removing the metal rings. You can remove the clip-on lid with your nail. The old battery can be pushed out through the hole in the middle. Be careful: If you change the battery incorrectly, or with a battery that is not suitable, it can cause damage to the remote. Replace the battery using the same voltage, size and specification as the original. If your key device was submerged in water it may be necessary to clean the chip prior to replacing the battery. This is especially crucial if it was dropped in the sea, or soapy water. This should be taken care of immediately as exposure to water can damage the chip's electronic circuit and cause your key fob to stop functioning. Worn Buttons The most common reason for why a Seat Ibiza replacement key fails to function is due to the battery in the key being dead. It is a simple fix that takes just a few moments. The key fob can stop working if its buttons are worn. It is an easy fix that requires you to replace the key shell that was used to replace it with an updated one. It is important to replace the button cell battery correctly, or the key fob could become damaged. It is recommended that you always use a brand new battery that is the same size in terms of voltage, size, and specification. It's also essential that the polarity of the new battery is towards the upwards. Rubber seals should keep water away from the key fob. However submerging the key fob in water may cause the seals to crack and harm the electronic chip inside. This usually happens if you accidentally drop your key fob into the pool or leave it in the rain. If your key fob does not work after replacing it or reprogramming, the receiver module might be defective. Water Damage The key fob has rubber seals that prevent water from getting into the electronic chip inside. However it's not enough to prevent the occasional bath or splash. If you've gotten through a washing cycle or an ocean swim, the chip may be damaged. It is possible to fix this by getting rid of the battery and then cleaning the chip using isopropyl ethanol or electronic cleaner. Let it dry completely, then put it back. If the chip is fried then it must be replace it with a brand new chip. If your key fob doesn't work even after changing the battery or reprogramming it, the problem could be with the receiver module. This is the part in the car that receives signals from the key fob and transmits them to the key ignition system. It is possible to test it by trying the spare key fob if you have one. This should cause the ignition system light come on and the central locking activate. If this doesn't happen, the receiver module may be defective. This is a costly fix however it can be repaired by an expert at your local garage. Radio Interference The receiver module in your key could be causing interference. This can be corrected with a replacement key with an entirely new receiver module from Seat parts. To replace the battery, pull off the key piece and using your thumb nail or a screwdriver that has a flat head, gently pry upwards the key fob's compartment cover. Take off the old CR2025 battery and insert a new one, making sure that it has the proper the polarity. You can also make use of an ordinary key that has transponder chip previously on a worn or damaged key. This can be cut and coded to your car in the event of need. Faulty Receiver Module The receiver module on your key fob transmits radio signals to the car. If the fob doesn't work, it could be that the module is malfunctioning. You can diagnose this using an OBDII scanner tool or by contact your dealer. The remote keyless entry system is vulnerable to interference from other devices that operate on the same frequency. This includes mobile phones, electrical devices and even household appliances. If the key fob is exposed clean tap water, it may be possible to clean the chip using paper towels and isopropyl alcohol. If G28 is submerged in salt or soapy water, or sat on a wet floor for long periods, it is most likely to cause damage and will likely require replacement. To change the battery, use a small flat-head screwdriver or a fingernail to push open the compartment for the button cell batteries (B). Remove the battery that was in there and replace it with an CR2025 replacement battery, making sure the “+” polarity of the battery is facing upwards.